Add useful Nim link resources

[John3]

Add this to the resource section of nim

To install use choosenim

• https://github.com/dom96/choosenim

Tutorial:

• https://narimiran.github.io/nim-basics/
• https://nim-lang.org/learn.html
• https://nim-by-example.github.io/

Video Tutorial:

• https://invidio.us/playlist?list=PLvwc2YT9MFOlPPexrsY-t7BNTdg2Vsx06

Book:

• https://www.manning.com/books/nim-in-action
• https://xmonader.github.io/nimdays/

Awesome List:

• https://github.com/VPashkov/awesome-nim

Rosettacode

• http://rosettacode.org/wiki/Category:Nim

Chat/Forum

• https://gitter.im/nim-lang/Nim
• https://forum.nim-lang.org/

Just a review from some guys

• https://www.quora.com/q/rjkfuyxmrnnbmjjx/To-Nim-or-not-to-Nim
• https://www.quora.com/What-is-your-review-of-Nim-programming-language

[ee7]

Thanks for creating this issue.

I agree that the docs could use some updates/improvements. This is a priority on my to-do list for the repo.